Topic: cb750 frame number

[ogre]

hi i am a new member from rochdale uk wondering if anyone can help just bought cb750 1969-70 came from michigan us but i bought it off someone in uk been registered in uk bit of a mess but good project the engine number is 10381.. and frame number on reg document is 10378.. but there is no number on the stem of frame no evidence of grinding etc frame doesn't look like its been coated cos it looks original and rusty in places can they put the number anywhere else.
 

[754]

Not saying frame has  beeen switched but yiu could lightly sand or rub with wet rag to see if there are numbers or rivet holes for data tag.. both sides of the neck , closer to front.

 Would not hurt to check near the right main footpeg, see if there is a stop bracket for the brake pedal, if its a later frame it will have the bracket welded on.

[ogre]

i have sanded neck no evidence of tampering anywhere will check foot peg thanks

[Mark M]

Sounds very iffy to me mate - I'll happily help you out and take it off your hands for your purchase price.
Just pop it in an extra large jiffy bag and I'll send you a postal order by return

[Hinomaru]

Welcome to the SOHC forums.

Perhaps we can get to the bottom of your mystery frame?

This is what your original USA market frame data tag should look like and it's held on with two rivets. It's located on the right side of the neck, just forward of the gas tank. If it's missing you should see the two rivet holes as per 754's post above.



Honda stamped CB750K frame numbers on the left side of the neck as the photo below shows:



This what the left side stamped frame numbers should look like:

[bryanj]

If there are no grinding marks and no rivet holes it could have been a replacement frame on which the dealer is supposed to stamp the original number but didn't always.

I am in Gloucester UK and if you want to ring me on 07795162623 from a landline WITHOUT witholding the number any evening Sunday through Thursday inclusive AFTER 8pm i will ring you back and give you some ideas

[ogre]

sanded both sides of the neck now and there are no signs of rivet holes or numbers and there is no bracket near the footpeg for the back brake lever definitely looks like original paint as well

[Hinomaru]

Looks like you no longer have the original frame with the serial numbers. Can you post some photos of your frame?

[754]

Early 69s did not have data tags. And British may not have got them till later. I think Australia did not use them the first few years.
 Soulds like it may be a replacement frame as was mentioned.

[ogre]

thanks for your comments and advice i will try and upload photos of the frame i take it you need to use photobucket.